JP2012510834A - Body excrement collection device comprising a laminated adhesive composition having a film layer - Google Patents

Abstract

  A body excrement collecting instrument comprising a collection pouch and an adhesive piece for attachment to the body, the adhesive piece comprising a support layer (21), at least one intermediate adhesive layer (22), and a skin adhesive layer (23) and a film layer (24), wherein the intermediate pressure-sensitive adhesive layer and the skin-contacting pressure-sensitive adhesive layer include a liquid-impermeable moisture-permeable flexible pressure-sensitive adhesive, and the film layer is the skin-contacting pressure-sensitive adhesive layer. And the intermediate pressure-sensitive adhesive layer.

Description

  The present invention relates to a body excrement collection device comprising a pressure sensitive adhesive composition for attaching a collection pouch to human skin, said composition comprising at least two flexible adhesive layers.

The main situations that need to be considered when adhering a collection device to human skin are as follows:
1) Adhesive mounting; the adhesive must remain in place and must not be detached or peeled off by skin or body movements.
2) Removal of the adhesive; the adhesive should be easy to remove without resulting in excessive pain or skin damage.
This is a paradox-the adhesive must stay in place and be easy to remove. The current solution is an adhesive compromise that addresses the two situations.

  A flexible adhesive system has been found to be advantageous for use as a skin-friendly adhesive wafer.

  New possibilities for designing skin-friendly adhesive strips are obtained using permeable adhesive materials. The amount of filler added to control moisture from the skin is relatively small, thereby increasing the flexibility of the adhesive. Moisture permeable materials can be formulated to be very flexible as material properties. This is the main factor for designing a flexible adhesive system. Furthermore, a permeable film having a very flexible property can also be blended, and in this way, an adhesive strip configuration having a certain flexibility can be designed. With regard to attaching a soft adhesive strip to the skin (as opposed to a standard hydrocolloid strip), the flexible adhesive strip can follow the movement of the body and does not feel the adhesive peels off. Comfort and stability are obtained.

  The composition described in international application PCT / DK2008 / 050148 is a flexible, impermeable, moisture-permeable skin-facing adhesive that allows moisture to diffuse from the skin through the adhesive material. It is an adhesive composition of a layer. This configuration further includes a water-impermeable and moisture-permeable non-skin layer containing absorbent particles so that moisture is absorbed by the particles.

  Surprisingly, a method has been found that separates the two situations described above so that the ability of the flexible adhesive to be easily removed can be controlled independently of the ability of the flexible adhesive to remain in place. It was.

  The present invention relates to a bodily waste collection device comprising a pressure sensitive adhesive composition for attaching a collection pouch to human skin, the composition comprising at least two flexible adhesive layers and a film layer. Surprisingly, it has been found that the peel force can be controlled easily and independently by introducing a film layer between the two flexible adhesive layers.

  The present invention will be disclosed in more detail with reference to the drawings.

It is sectional drawing of the structure of a known laminated adhesive composition. It is sectional drawing of the structure of one Embodiment of this invention. It is a figure which shows the peeling force in a different adhesive structure and adhesive composition.

  The object of the present invention is to improve the user's comfort when removing the adhesive, and at the same time to adjust the peel force so as not to reduce the ability of the adhesive to secure the collection device to the human skin. It is.

In one embodiment of the present invention, the bodily waste collection device is
-A collection pouch;
-Adhesive pieces for attachment to the body,
-Support layer-at least one intermediate adhesive layer-skin adhesive layer-film layer,
An adhesive strip comprising:
The intermediate pressure-sensitive adhesive layer and the skin adhesive layer include a liquid-impermeable moisture-permeable flexible pressure-sensitive adhesive, and the film layer is disposed between the skin adhesive layer and the intermediate pressure-sensitive adhesive layer.

  The body excrement collecting device means a device capable of collecting and holding excrement in a collecting article for a predetermined time. A skin adhesive may be used to hold the device in place and a bag may be used for collection.

  In the adhesive theory, the peel force decreases with decreasing adhesive thickness.

  “In adhesion including peeling of a soft elastic adhesive from a hard adherend, it is expected that when the thickness of the adhesive is changed, the peel force increases proportionally with the thickness of the adhesive. I can see it theoretically. " [Theory and Analysis of Peel Adhesion: Adhesive Thickness Effects, D.E. H. Kaelble, The Journal of Adhesion, vol. 37, 1992]

  Therefore, in the adhesive system, it is possible to control the peeling force by changing the thickness of the adhesive. The system must be flexible so that there is a marked decrease in peel force with decreasing adhesive thickness. The hard adhesive layer having high rigidity is still highly rigid and hard even after the thickness of the adhesive is adjusted. Thus, such a hard system may not show the same effect as a flexible adhesive-based system.

The adhesive of the adhesive strip must be flexible so that the entire adhesive strip can be extended. Therefore, the flexible pressure-sensitive adhesive layer means a pressure-sensitive adhesive layer having a complex elastic modulus G ^* as defined herein of less than 50 kPa when measured at 32 ° C. and 1 hz.

  The peeling force of the flexible adhesive on the adhesive piece can be controlled by changing the thickness of the adhesive. However, the thickness of the adhesive cannot be changed without affecting other functions of the adhesive strip. For example, if the thickness is too thin, the adhesive composition may not be able to maintain absorbency or adhere to the skin.

  A design having a support layer and a thin pressure-sensitive adhesive layer can also provide a desired effect of reducing the peeling force. However, such a configuration may make it difficult to handle the adhesive piece during sticking and removal. Such a flexible and thin composition is almost impossible to be properly applied to an adherend (skin). Another problem is adjusting the moisture so that the skin is not damaged by maceration with sweat moisture. This problem is important when the adhesive strip is attached to a bag as in a stoma product. Since the humidity in the bag is close to 100%, the skin cannot breathe through this thin adhesive composition, and eventually a soft soak of the skin occurs. Therefore, the moisture control layer is important.

  Surprisingly, adding a film layer to the adhesive strip controls the peel force of the flexible stoma adhesive strip and still meets the permeability and absorbency requirements, thereby having a skin-friendly adhesive system I found out that

  In order to control the peel strength of the skin adhesive, the present invention introduces a flexible moisture-permeable film layer between the skin adhesive layer and the intermediate adhesive layer. In this way, the adhesive strip is divided into two separate layers, the peel strength is controlled using the thickness of the skin adhesive layer, and the moisture penetrates the moisture permeable film layer and the intermediate adhesive layer. Can enter and thereby maintain a skin-friendly adhesive strip.

  In this way, the peelability can be changed without significantly changing other adhesive properties such as, for example, initial tack, retention, and permeability. If the composition is changed, other adhesive properties are always lost.

  Control of the peel force is important in preparing the adhesive to suit a particular application such as, for example, mounting time or type of use.

  Incorporating a film layer to control the peel force results in a “less“ lively ”adhesive strip without significantly compromising the overall flexibility of the system. This is due to the difference in the radius of curvature of the film incorporated in the adhesive piece. Less deformation means that the adhesive strip itself does not tend to bend or curl when the protective coating or release liner is removed. The feature that the deformation is small is useful when the adhesive piece is applied to the skin, and therefore it is easy to handle. It can also be seen that when a film layer is introduced between the adhesive systems, it is necessary that the extension of the adhesive strip is small in order to remove the product. It is important that the user have a soft adhesive strip that does not stretch too much during removal.

  In one embodiment of the invention, the film layer is permeable.

The film layer of the present invention must be permeable so that moisture from perspiration from the skin is removed, thus providing a healthy environment for the skin. As the skin to maintain a healthy state, transmittance of the film layer should be higher than 500g ^/ m ^2/24 hours, preferably it has to be higher than 1000g ^/ m ^2/24 hours.

  The permeability of the film layer may be a material property or may be a property derived, for example, by perforating the film layer.

  In another embodiment of the invention, the film layer may be perforated.

  Perforation of the film layer allows the film to be selected from the group of impermeable films. Perforation makes the film layer open. Perforation of the film layer is usually performed by forming holes or cuts in the film layer in a long line or in an area. The perforated film layer must meet the aforementioned transparency criteria.

  In this context, the film layer means a non-woven fabric or a foamed film layer. Nonwovens can be manufactured to have a high permeability and thus be suitable for the purposes of the present invention. The foam film layer is made of open cell foam and may thus be highly permeable or may be formulated from a highly permeable material. Since the total thickness of the material of the foam film layer is small, the foam film layer can be made highly permeable by foaming even if the material properties are low permeable.

  According to one embodiment of the present invention, the film layer has a higher elastic modulus than the intermediate pressure-sensitive adhesive layer. In a preferred embodiment, the elastic modulus of the film layer is higher than 10 times that of the intermediate pressure-sensitive adhesive layer.

  In one embodiment of the invention, the thickness of the film layer is less than 100 μm. Preferably, the film layer has a thickness of 10 to 50 μm.

  In one embodiment of the invention, the film layer comprises EVA, EBA, PU or PE.

  EVA, EBA, PU or PE means EVA (ethylene vinyl acetate), EBA (ethylene butyl acetate), EMA (ethylene methyl acetate), PU (polyurethane) or PE (polyethylene).

  In the case of a flexible adhesive system, the material used is moisture permeable. This material feature is used to allow moisture to escape from the skin, thereby ensuring that a healthy environment and an intact, undamaged skin are maintained.

  The liquid-impermeable moisture-permeable layer is a layer that cannot transmit liquid but can transmit water vapor. This layer holds liquid sweat in the vicinity of the sweat glands, but allows the sweat to diffuse slowly through the layer.

In one embodiment of the present invention, the water vapor transmission rate of the contact skin adhesive layer and / or the intermediate adhesive layer of liquid impermeable moisture permeable adhesive composition is higher than 100 g / m ^2/24 hours, preferably 200g higher than / ^m 2/24 hours.

  According to one embodiment of the present invention, the thickness of the peel adhesive layer is less than 200 μm.

  According to one embodiment of the present invention, the peel adhesive layer has a thickness of at least 25 μm, and preferably has a thickness greater than 50 μm.

  In a preferred embodiment of the present invention, the thickness of the peel adhesive layer may be 80 to 120 μm.

  In one embodiment of the present invention, the skin adhesive layer is low absorbent.

  Low absorbency, as defined herein, means that the water absorption is less than 8%, preferably less than 4%.

  The pressure sensitive adhesive for the thin skin layer may be any hydrophobic adhesive that has sufficient vapor permeability. Such pressure-sensitive adhesives are typically pressure-sensitive adhesives containing one or more polymers that impart cohesive strength to the pressure-sensitive adhesive, and optionally an oil that adjusts adhesion and a tackifier.

  According to one embodiment of the present invention, the skin layer of the liquid-impermeable moisture-permeable pressure-sensitive adhesive composition is a permeation selected from the group of polypropylene oxide, polyurethane, ethylene vinyl acetate, silicone, polyacrylate, and mixtures thereof. Including, but not limited to, a functional polymer.

As used herein, moisture permeable polymer, when measured with a film of 150μm of the material using the methods described herein, greater moisture permeability 100g / m ^2/24 hours, preferably 300g It means greater than the polymer / ^m 2/24 hours.

  According to one embodiment of the present invention, the permeable polymer is less absorbent and absorbs less than 8% by weight, preferably less than 4% by weight at equilibrium.

  In one embodiment of the invention, the skin pressure sensitive adhesive is crosslinked.

  As used herein, crosslinking means a small site where three or more chains in a polymer (polymer chain structure) are exposed. The bond may be a covalent bond, a physical bond, or an ionic bond.

  In another embodiment of the invention, the skin pressure sensitive adhesive comprises a block copolymer.

  As used herein, a block copolymer has a repeating unit of the main chain in block form, for example,-(a) m- (b) n- (a) p- (b) q- , A, and b are repeating units, and n, m, p, and q are numbers.

  In a preferred embodiment of the present invention, the skin pressure sensitive adhesive comprises polypropylene oxide.

  In a preferred embodiment of the invention, the skin pressure sensitive adhesive comprises polyurethane.

  In a preferred embodiment of the invention, the skin pressure sensitive adhesive comprises ethylene vinyl acetate.

  The pressure-sensitive adhesive composition containing ethylene vinyl acetate is preferably a pressure-sensitive adhesive known in the art such as the pressure-sensitive adhesive composition disclosed in International Application PCT / DK2008 / 050146. Good.

  In a preferred embodiment of the invention, the skin pressure sensitive adhesive comprises silicone.

  In a preferred embodiment of the invention, the skin pressure sensitive adhesive comprises a polyacrylate.

  According to one embodiment of the present invention, the skin-contacting layer of the liquid-impermeable moisture-permeable pressure-sensitive adhesive composition covers the entire skin-contacting surface of the pressure-sensitive adhesive piece.

  According to another embodiment of the present invention, the skin-contacting layer of the liquid-impermeable moisture-permeable pressure-sensitive adhesive composition partially covers the skin-contacting surface of the pressure-sensitive adhesive piece.

  In a preferred embodiment of the present invention, the skin layer of the liquid-impermeable moisture-permeable pressure-sensitive adhesive composition covers at least 75% of the skin surface of the pressure-sensitive adhesive piece.

  According to one embodiment of the present invention, the intermediate pressure-sensitive adhesive layer is absorbent.

  In a preferred embodiment of the invention, the intermediate layer has a water absorption capacity greater than 15% as defined herein.

  It may be advantageous for the intermediate pressure-sensitive adhesive layer to contain absorbent particles. According to one embodiment of the present invention, the intermediate pressure-sensitive adhesive layer includes absorbent particles.

  In order for the layer to absorb moisture from the skin, the particles may be absorbent particles such as salts, hydrocolloids, microcolloids, or superabsorbers.

  The preferred particle size of the absorbent particles is relatively small so that the absorbent particles are relatively invisible to the naked eye and a product with a relatively good appearance is obtained. The upper limit of the particle size is the size of the smallest dimension of the layer. Thus, a 300 μm thick layer should not contain particles with a diameter greater than 300 μm. Hygroscopic particles tend to agglomerate, and this effect increases as the particle size decreases. Accordingly, the preferred particle size is 10 to 300 μm. Moreover, in order to reduce aggregation of small particles, the particles may contain an aggregation inhibitor.

  Microcolloid particles are well known in the art, for example from WO 02/066087, which discloses an adhesive composition comprising microcolloid particles. The particle size of the microcolloid particles may be less than 20 microns.

  The intermediate pressure-sensitive adhesive layer may contain 1-40% w / w hydrocolloid (HC) or superabsorbent particles (SAP), more preferably 5-30% w / w particles.

  Salt may be advantageous for use as an absorber of the device of the present invention. A salt such as sodium chloride has an equilibrium vapor pressure of about 75% RH at the skin temperature and absorbs water from the skin and excrement due to the difference in vapor pressure.

  In one embodiment of the present invention, the intermediate pressure-sensitive adhesive layer contains inorganic salt particles. The salt may be present in an amount of 1-50% w / w, more preferably in an amount of 5-25%.

  The salt may be an inorganic salt or an organic salt.

According to one embodiment of the invention, the intermediate adhesive layer comprises NaCl, CaCl ₂ , K ₂ SO ₄ , NaHCO ₃ , Na ₂ CO ₃ , KCl, NaBr, NaI, KI, NH ₄ Cl, AlCl ₃ , and These include, but are not limited to, water soluble inorganic salts from the group of mixtures, preferably NaCl.

According to another embodiment of the present invention, the intermediate adhesive layer comprises, but is not limited to, water soluble organic salts from the group of CH ₃ COONa, CH ₃ COOK, HCOONa, HCOOK, and mixtures thereof. is not.

  According to one embodiment of the present invention, the intermediate pressure-sensitive adhesive layer of the liquid-impermeable moisture-permeable pressure-sensitive adhesive composition is selected from the group of polyalkylene oxide, polyurethane, ethylene vinyl acetate, silicone, polyacrylate, and mixtures thereof. Permeable polymer.

  Preferably, the hydrophobic matrix of the peel adhesive and the intermediate adhesive layer is identical in composition or close to identical to prevent migration of species between the two layers.

  According to one embodiment of the present invention, the intermediate layer is based on the same type of polymer component as the permeable adhesive composition used for the skin layer. Thus, the components of the intermediate pressure-sensitive adhesive layer may be selected from the group of, but not limited to, polypropylene oxide, polyurethane, ethylene vinyl acetate, silicone, polyacrylate, and mixtures thereof, Optionally, it may be made absorbent by adding particles.

According to one embodiment of the present invention, the elastic modulus G ^* of the peel adhesive layer and the intermediate adhesive layer is less than 50,000 Pa, preferably less than 20,000 Pa when measured at 1 hz and 32 ° C.

  According to one embodiment of the present invention, the intermediate adhesive layer is thicker than the peel adhesive layer.

  According to another embodiment of the invention, the peel adhesive layer is less than 33% of the thickness of the intermediate adhesive layer.

  The support layer of the device of the present invention is preferably in the form of a polymer film, coating, laminate, textile, or nonwoven. The support layer is preferably a highly flexible film, e.g. strong enough to attach a connector and / or pouch and to remove a unitary device, but follow body movements There is also enough flexibility.

  In one embodiment, the support layer is a polyurethane film, optionally a laminate or a coextruded film or cast film.

  Preferably, the support layer has a thermoplastic element that makes it possible, for example, to weld a pouch or connecting ring to the adhesive strip. In order to maintain the flexibility of the pressure-sensitive adhesive piece, a preferable thickness of the support layer is 15 to 60 μm.

  In one embodiment of the invention, the support layer is vapor impermeable.

  According to another embodiment, the support layer is a multilayer film. Each layer of the film imparts specific properties to the support layer. A thin weldable layer ensures that the bag or connector is securely bonded, and a relatively thick flexible layer ensures mechanical properties.

  According to another embodiment, the support layer is a foam having a thickness of 15 to 500 μm. Suitable foam support layers are, for example, polyethylene foam, ethylene vinyl acetate foam, polyurethane foam, polyalkylene oxide and / or polyalkylene oxide siloxane foam.

  The adhesive strip of the present invention is optionally partially or fully coated with one or more release liners or coating films that are removed before or during application. The protective coating or release liner may be, for example, siliconized paper. It need not have the same shape as the adhesive strip. The release liner can be any material known to be useful as a release liner for medical devices.

  According to one embodiment of the present invention, the collection pouch is detachable.

  According to another embodiment of the invention, the collection pouch is integrated with the adhesive strip.

  The collection pouch may be detachable from the adhesive piece by a connection system, or the pouch and the adhesive piece may be integrated with the adhesive piece, for example, by welding. These two forms are known as one-piece stoma appliances or two-piece stoma appliances.

  The skin contact surface of the adhesive means the side that adheres to the skin.

  The surface on the bag side or the non-cutting surface means the side of the pressure-sensitive adhesive or support (non-bonding side) facing away from the skin.

  According to one embodiment of the invention, the collection device is a stoma appliance.

  According to another embodiment of the invention, the collection device is a stool collection device.

  According to another embodiment of the invention, the collecting device is a fistula collecting device.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail with reference to the drawings of FIGS. 1 to 3 which show a preferred embodiment of the present invention.

  FIG. 1 shows a side view of configuration 1 of a known laminated pressure-sensitive adhesive composition comprising a support layer (11), an intermediate pressure-sensitive adhesive layer (12) and a skin-adhesive pressure-sensitive adhesive layer (13). There is no film separating the two adhesive layers.

  FIG. 2 shows a side view of configuration 2 of one embodiment of the present invention including a support layer (21), an intermediate pressure-sensitive adhesive layer (22), a skin-adhesive pressure-sensitive adhesive layer (23), and a film layer (24). .

  FIG. 3 is a diagram showing the peel force in different pressure-sensitive adhesive configurations and pressure-sensitive adhesive compositions.

Materials and Methods Methods Water Absorption Measurements A modified version of the ISO 62 standard was used to better compensate for the measured water absorption and actual performance in the human-like environment: 1 × using double-sided adhesive A 25 × 25 mm ³ pressure-sensitive adhesive piece was fixed to a glass piece, and this structure was immersed in 32 ° C. saline (0.9% NaCl in demineralized water). After 24 hours, the sample was removed, carefully suspended and dried, and weighed. The change in weight was recorded and reported as a weight increase in percent of the dry weight of the original adhesive. Hereinafter, this value is referred to as w _24h .

Measurement of Moisture Permeability (MVTR) MVTR was measured in grams per square meter (g / m ² ) over 24 hours using an inverted Paddington cup method (British Pharmacopoeia, 1993, Addendum 1996, page 1943. HMSO London). : A water or water vapor impermeable container or cup having an opening was used. 20 ml of saline (0.9% NaCl in demineralized water) was placed in the container and the opening was sealed with a test adhesive film. The container was duplicated into an electrothermal wet box and the container or cup was placed upside down so that the water contacted the adhesive. The wet box was maintained at 37 ° C. and 15% relative humidity (RH). After about 1 hour, the container was considered to be in equilibrium with the surrounding environment and weighed. After 24 hours from the first weight measurement, the weight of the container was measured again. The difference in weight was due to evaporation of the vapor that passed through the adhesive film. This difference was used to calculate moisture permeability or MVTR. MVTR was calculated as divided by the weight loss after 24 hours by the area of the opening of the cup ^{(g /} m ^2/24 hours). When the adhesive film could not support the weight of water, a support film with very high permeability was used as the support.

Measurement of G ^* “Dynamics of polymer liquids”, Vol. 1, sec. ed. 1987, Bird, Armstrong and Hassager, John Wiley and Sons Inc. The parameter G ^* or the complex elastic modulus defined in 1 was used as a measure of the hardness of the adhesive. Note that here G ^* means the absolute value of the complex G ^* to avoid confusion. G ^{* at} 32 ° C. and 1 Hz was measured as follows: a plate of non-foamed adhesive material was pressure molded into a 1 mm thick plate. A circular sample with a diameter of 25 mm was cut and placed in a RheoStress RS600 rheometer manufactured by Thermo Electron. In order to ensure that the measurements were in the linear regime, the geometry used was a parallel plate of 25 mm and the strain was fixed at 1%. The measurement was performed at 32 ° C.

Example 1
In Example 1, the decrease in peel force was measured when there was a film layer in a different adhesive system or when there was no film layer.

  A 25 × 100 mm pressure-sensitive adhesive strip for a peel test was prepared to a thickness of 1 mm. Table 1 below shows the adhesive composition. The intermediate adhesive layer formulation and the skin layer formulation in the composition were the same.

  1my means 1 μm. The data in Table 1 indicates the layer thickness.

  Two configurations were made for each adhesive system.

  Configuration 1 was a 1 mm thick flake with a 40 μm flexible polyurethane top film (Bioflex 180 from Scapa Medical). They were simply pasted together so that the intermediate adhesive layer and the skin adhesive layer function as one adhesive having a thickness of 960 μm.

  Configuration 2 is a 1 mm thick with a 25 μm flexible polyurethane support layer (Bioflex 180 from Scapa Medical) and a 15 μm flexible polyurethane film layer (Bioflex 180 from Scapa Medical) that divides the adhesive in two. It was a flake. The skin adhesive layer was 200 μm, and the intermediate adhesive layer was 760 μm.

  In configurations 1 and 2, the total thickness of the film layer was 40 μm (40 μm or 25 + 15 μm).

  Three types of adhesive were tested. In each configuration, the intermediate pressure-sensitive adhesive layer and the skin pressure-sensitive adhesive layer were the same.

  % Means% (w / w).

  The material was manually mixed in a cup for 1 minute and cured in a mold for 30 minutes at 90 ° C. to obtain the desired configuration. A 25 × 100 mm adhesive strip for the peel test was cut from the adhesive strip. The desired film was selected for configurations 1 and 2.

  An adhesive was prepared by mixing the material with a Z blade at 120 ° C. for 1 hour. In order to plasticize the system, the γ-irradiated material had to be first mixed with glycol. The configurations of 1 and 2 were produced by a hot press similar to the procedure for the adhesive C.

  C—Standard hydrocolloid adhesive system (25% Kraton D-1161, 35% Arkon P90 resin, 5% dioctyl adipate plasticizer and 35% Blanose 9H4X, Aqualon hydrocolloid) was used as the standard adhesive.

  Configuration 1 was obtained as follows: All raw materials were mixed in a Z blade mixer at 140 ° C. for 1 hour. A 1 mm-thick plate flake was produced by hot pressing at 90 ° C. for 10 seconds in a 1 mm deep mold (1 × 150 × 150 mm).

  The pressure-sensitive adhesive composition was heated and pressed between two silicone-treated films to 200 μm and 760 μm, respectively, to produce configuration 2. By pressing between two silicone-treated films, the silicone-treated film can be removed without destroying the adhesive. A suitable silicone treated film is a 110myPP liner having a silicone coating 1808 from Huhtamaki. The desired configuration with a 25 μm support layer and a 15 μm film layer is obtained by laminating the materials by hot pressing at 90 ° C. for 10 seconds in a 1 mm deep mold. Both configurations were coated with a silicone treated protective film prior to hot pressing. The configuration is then cut into 25 × 100 mm strips and ready for testing.

  Using an Instron 5564 with a 100N load cell, the peel force was measured at 100 m / min and 25 ° C. The release adherend was paper in the flexible adhesive configuration and steel in the hydrocolloid adhesive. A double-layer adhesive tape was used to secure the paper to the solid surface. Newspaper is used as the paper peeling adherend. Three samples were tested for each configuration.

Results FIG. 3 shows a diagram illustrating the peel force in different pressure-sensitive adhesive configurations and pressure-sensitive adhesive compositions. The peel force was measured as an AVG peel load [N].

  There was a noticeable decrease in peel force in the soft adhesives A and B (peel front surface changed from 1,000 μm to 200 μm). A reduction in peel strength was obtained without compromising other adhesion properties such as retention, moisture control and initial tack. A typical way to reduce the peel force is to re-form the adhesive so that it is easy to remove. Even when a film layer is added, a relatively high-strength adhesive rather than a film layer tends to control the peeling force. Therefore, when using a relatively rigid adhesive C, a change in the peeling force is observed. Absent. In that case, even if the film layer is close to the skin, the peel force is not affected.

  In the case of a flexible pressure sensitive adhesive system using pressure sensitive adhesive A or pressure sensitive adhesive B, a decrease in the elongation of the pressure sensitive adhesive composition 2 was observed. This is due to a decrease in peeling force. In the adhesive C, since the peeling force did not decrease, no decrease in elongation was observed.

  When the peel strength of the pressure-sensitive adhesive shown in the Examples is reduced, when the pressure-sensitive adhesive is removed from the adherend, the pressure-sensitive adhesive also reduces elongation. This effect is effective in addressing the problem because it is desirable to remove the adhesive without over-extension and to maintain stability when wearing the flexible and comfortable adhesive strip configuration of the present invention. .

Claims (20)

A body excrement collecting device,
-A collection pouch;
-Adhesive pieces for attachment to the body,
-Support layer-at least one intermediate adhesive layer-skin adhesive layer-film layer,
An adhesive strip comprising:
The intermediate pressure-sensitive adhesive layer and the skin-adhesive pressure-sensitive adhesive layer include a liquid-impermeable moisture-permeable flexible pressure-sensitive adhesive, and the film layer is disposed between the skin-adhesive pressure-sensitive adhesive layer and the intermediate pressure-sensitive adhesive layer. Has been a body excrement collection device.   The collection instrument according to claim 1, wherein the thickness of the peel adhesive layer is less than 200 µm. The film layer is permeable, preferably the permeability of the film layer is higher than 500 g / m ^2/24 hours, collection device according to claim 1 or 2.   The collection device according to any one of claims 1 to 3, wherein the film layer is perforated.   The elastic modulus of the said film layer is higher than the said intermediate adhesive layer, Preferably the elastic modulus of the said film layer is higher than 10 times the elastic modulus of the said intermediate adhesive layer. Collection equipment.   The collection instrument according to claim 1, wherein the film layer has a thickness of less than 100 μm.   The collection device according to claim 1, wherein the film layer comprises EVA, EBA, PU or PE.   The collection device of claim 1, wherein the intermediate pressure-sensitive adhesive layer is absorbent. The collection instrument according to claim 1, wherein the elastic modulus G ^* of the skin contact layer and the intermediate pressure-sensitive adhesive layer is less than 50,000 Pa, preferably less than 20,000 Pa, when measured at 1 hz and 32 ° C.   The peel adhesive layer of the liquid impermeable moisture permeable adhesive composition comprises a permeable polymer selected from the group of polyalkylene oxide, polyurethane, ethylene vinyl acetate, silicone, polyacrylate, and mixtures thereof. The collection instrument according to any one of claims 1 to 9.   The intermediate pressure-sensitive adhesive layer of the liquid-impermeable moisture-permeable pressure-sensitive adhesive composition comprises a permeable polymer selected from the group of polyalkylene oxide, polyurethane, ethylene vinyl acetate, silicone, polyacrylate, and mixtures thereof; The collection instrument according to any one of claims 1 to 10. 12. A collection device according to claim 10 or 11, wherein the moisture permeability of the permeable polymer is higher than 100 g / m < ² > / 24 hours, preferably higher than 200 g / m < ² > / 24 hours.   13. A collection device according to any one of claims 10 to 12, wherein the permeable polymer is poorly absorbent and absorbs less than 8% by weight, preferably less than 4%, at equilibrium. The liquid the water vapor permeability of the contact skin adhesive layer and / or the intermediate adhesive layer of impermeable moisture permeable adhesive composition is higher than 100 g / m ^2/24 hours, preferably from 200 g / m ^2/24 hours 14. A collecting device according to any one of the preceding claims, which is higher.   15. A collection device according to any one of the preceding claims, wherein the intermediate layer is based on the same type of polymer component as the permeable adhesive composition used for the skin layer.   The collection instrument according to any one of claims 1 to 15, wherein the intermediate pressure-sensitive adhesive layer is thicker than the skin-adhesive pressure-sensitive adhesive layer.   The collection instrument according to any one of claims 1 to 16, wherein the peel adhesive layer is less than 33% of the thickness of the intermediate adhesive layer.   The collection instrument according to claim 1, wherein the collection instrument is a stoma appliance.   The collection device according to any one of claims 1 to 18, wherein the collection device is a stool collection device.   The collection device according to any one of claims 1 to 19, wherein the collection device is a fistula collection device.

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